DE2057719B2 - Device for coating metal wire or strip with molten metal - Google Patents

Description

drawn wire adjoining the liquid- a W ^ Jf ^ J? ^ ₅ Housing 54 is on

and that is provided on a flange 55 to regulate the temperature. _χ ^^

a predetermined value with the liquid lower part with gto ^^ _tin _ _B lei-Alloy

supply is coupled. through which you! Frischje housing 54

Another embodiment is thereby the creation of the Schmelzoaaes <*

indicates that the control device can flow away. _{Hansch 5g on d}

has deck nozzle, which between the guide member Da s housing 54 ι st nut _def ^^ ^

and the cooling chamber is set and fixed. Plate 59 movable ge ^ * ''_{'hen whose}

Below are several embodiments of a ^ ^s ^ f ^ f ^ Se circular opening

of the invention described. In the drawings is, o «f ^ ScS increasing circular

^dl Fig. 1 is a vertical section showing a control round recess; 60 is 1 from a £ cg "£" _

device shows, which covered the melted one at one. the m in the middle ^^^ _{] atte 63 is}

Metal containing container in the device round opening; 64 ^^^ gg _bef S _stig t. Between

is attached according to the invention, i ₅ on the plate 59 by means of ^ ^hrauDe £ J _{erseite d} ° _s pian-

F i g. 2 shows a diagrammatic representation of the cover plate 63 ^ d of the UDe ^r * _Es

Fig.! The control device shown and the sches 55 are ^ "^ agertaagelr βϊ '™ & ™ _γοη

Fi g. 3 is a graphical representation of the relationship is a bearing ring 68 with kochern «ivorg ^ _n

between the thickness of the coating and the distance from each hole a de ^ bearing balls 67 ^ a ^

tion of the underside of a nozzle from the surface * »As from Fig. _1J ^ ™ ^ * ^ Boden6 1 a

molten metal. . . Bottom of the flange 55 undoe _the

In order to simplify the description, a number of L ^^^. ^^^ Sommen

Before the invention described the holes ^ ^ j ^^^ gSSS ^ »

For the purpose of simplifying the description, a number of

Device according to the invention described, the holes ^ ^ j ^^^ gSSnS ^ »a copper wire with a coating of a solder. The bearing plate 59 is at aen jv. _With

fSen tin-lead alloy provides the wires * ₅ and 36 by means of a Sch ^{™ h} ™ ™ r ^d ™ £ _e ^f ₅₄ fn one l connecting wires of electrical components such as cons- help this A ^^^ J ^^ Kd die

fSen tin-lead alloy provides the wires * ₅ and 36 by means of Sch £ _{e 54} fn one as connecting wires of electrical components, such as resistance these A ^^^ J ^^ Kd the stands, capacitors and transistors, used horizontal plane freely moved_ wera, can be. ^ The construction according to the invention of the housing 54 cut axis perpendicular can be used without substantial changes to the structure of the beid ^ J! ¹ "™ ⁰ ^" ^^ strengthens both leadership

Of course, also for coating metal strips 30, inner wall 77 of the housing 54 fastened with various metals and alloys em- rungsgl.eder 51 and 52i are to be directed to the mine. Guide hole punches 78 or 79 ^ verset ^'e J' ^ ^he _{h] nits}

A device according to the invention is dimensioned in Fig. 1 so that Jr wire 1 mnaur g dtllt After a wire 1 can be necessary The two ^ ™ ¹¹ ^ ⁰ * " ⁷ J Lii

A device according to the invention is dimensioned i, J in FIG. 1

shown. After a wire 1 can be a necessary one. The two. ^ ™ ¹¹ ^ ⁰ * " ⁷ J _uf riner line,

Surface treatment has been subjected to ₃₅ successive ^^^ ™ ^d ÄtlSÄ «Ge ^

it in a molten pool 4 of a tin-lead alloy which is substantially paralle ^{to tHe} ™ _£ ^ _holes 78

immersed in the container 10 through a channel 31. House 54 runs The two tunrug ^

An opening 11 of the channel is in one side and 79 therefore lead the wire j -J **

immersed in the container 10 through a channel 31. house 54 runs the

An opening 11 of the channel is in one side and 79 therefore lead the wire

wall of the container 10 is provided. The wire 1 is parallel to the central axis of the ^^

40 Fuhrungsg leather 51 and 52 are guided along the undersides of swivel rollers in front of g

and extends upward through a rule in front of a hard steel, such as J-ormstani, ncr _B

direction 15 where the wire 1 with the tin-lead alloy to avoid wear. can

™ _g from the melt pool4 in the desired The two, guide belts 51 .una.Jl ^ can

Bead covered and subsequently cooled wmL To _also by a ™ ^ ^Ρ ^ ⁸⁸ £ 3 ₆ Γίο that

At this point in time, the coating 13 of the cooled 45 has been replaced by correspondingly large sections

Wire from the tin-lead alloy a pulpy the wire \ ^ '^ SrT ^ defaSuS 54 is a

Consistency on. The wire is attached to the inside wall 77 of the house with the aid of a front

directionΓπ-ach up in the direction of arrow 75 cover nozzle 80 in the form of a $ £ ^^ * föj £

pulled. As a result, the wire 12 cools to Zirnmertem- in the middle with an opening; 81

? b dß d cover 13 becomes firm 50 width ^^^^^^

pulled. This cools the wire 12 a

pe? atur, so that the coating 13 is solid 50 width

upper kLu ! ^ Snlrdfen 35 or 36 on. of the molten alloy 4 in the second container

SEE SASS ^M fS

ÄiSÄSÄ SU like tetrafluoro-

Then the "tin-lead alloy of the molten ethyl" uh ^ "teUL

⁵ SS: ««

S2ÄS one liquid to one

given height, which cools the coating 13 on the wire 1, so that this is in a mushy State is shifted.

It has been found that leakage of the liquid 85 can be prevented by regulating the liquid level and the clearance between the inner wall the bore 84 and the wire 1 with the coating 13 can be prevented.

The width of the margin depends on the surface tension of the liquid 85. Knows the Liquid 85 has a high surface tension, for example that of water, so the The width of the clearance should be approximately 0.15 mm. However, this is the surface tension of the liquid small, the clearance must be measured to be less than 0.15 mm.

The height of the liquid level also depends on the surface tension of the liquid 85 and in practice is 1 to 5 mm. The liquid level is controlled by an automatic regulator held at a predetermined level consisting of a monitoring member 87 and a liquid supply means 86. Both components are shown in FIGS. 1 and 2 on the cooling chamber 53 attached. The monitoring member 87 is in the form of a wire and is approximately the same Diameter as the wire carrying the coating and is preferably also made of the same metal. The monitoring member 87 is liquid-tight through a bore 94 in the bottom 83 of the cooling chamber 53 passed through and is in contact with the cover nozzle 80, so that the heat through the monitoring member 87 can flow through it upwards. At a point 97 there is a on the monitoring element 87 Thermocouple 96 attached, with which a temperature can be measured which is approximately the temperature of the coating 13 on the wire 1 corresponds. The thermocouple 96 is associated with an electronic Temperature controller 98 in connection, which in turn with an electromagnetic valve 91 is in communication, which has an inlet 93 and an outlet 92. The inlet 93 of the valve is up with a liquid source, not shown, in connection. As shown in FIG. 1 can be seen, has the liquid supply means 86 is in the form of a small tube with a mouthpiece 88 and with an attached to this bracket 89, with the help of which the mouthpiece 88 on the side wall the cooling chamber 53 is attached. A flexible tube or hose 90 is attached to the mouthpiece 88, which is connected at the other end to the outlet 92 of the electromagnetic valve 91. If the electromagnetic valve 91 is opened by the electronic temperature controller 98, the Liquid 85 from a liquid source, not shown, through inlet 93, outlet 92 and let into the cooling chamber 53 through the flexible tube 90.

In operation, the temperature of the wire 1 at the bore 84 is much higher than the boiling temperature of the liquid 85. Under the action of the wire 1 carrying the coating 13 and the Monitoring member 87 radiated heat evaporates part of the liquid 85. The extent of The cooling of the wire 1 and the monitoring element 87 is proportional to the surface areas, which are in contact with the liquid 85. If the level of the liquid 85 is lowered, the Cooling of the wire 1 and the monitoring member 87 reduced, so that the temperature at Point 97 increases. By regulating the height of the level of the liquid 85, the level of the point 97 the coating 13 can be kept at a predetermined temperature. An electronic temperature controller with automatic return is described z. B. in the article: Automatic Feedback Control by W. Ahrend and J. F. Taplin, 1951, McGraw-Hill Book Co., Inc., New York, Tront, London.

The operation of the control device 15 will now be described. During operation, wire 1 through the guide holes 78, 79, through the opening

, 5 81 and the bore 84 is drawn up into the ambient air. Here is the wire 1 with the Coating 13 is provided, which is initially liquid and later mushy. The coating 13 is cooled largely by heat absorption of the liquid 85 in the form of latent heat of vaporization. It will therefore, a liquid with a large latent heat of vaporization is preferably selected.

Since the housing 54 is movably mounted on the plate 59, it can follow the wire 1 when this

aj executes oscillatory movements, and also perform the Guide holes 78, 79 the wire 1 exactly in the feed direction, so that damage to the coating 13 as a result of contact with the inner wall of the bore 84 is avoided.

Below are some examples of how it works the device according to the invention described.

A wire made of electrolytic copper with a diameter of 1 mm was initially connected to a flux

3g treated medium that is listed in Table I. Composition had:

Table I.
Composition of the flux

Weight percent

Chlorine 6.0

Zinc 1.3

Ammonium 0.3

Surface treatment agent 1.0

Water 91.4

The container 10 was filled with a molten lead-tin alloy, the proportion of the Tin was 30 percent by weight and the proportion of lead was 70 percent by weight. The temperature of the Melt in container 10 was held at 290 ° ± 1 ° C.

The inside width of the guide holes 78, 79 was 1.02 mm, while the inside width of the opening 81 was about 2 mm. The inside width of the bore 84 was 1.2 mm. The wire speed was 50 m / min. The resulting thickness of the coating on the wire changed with the temperature of the Alloy and wire speed. Besides these two factors it is still considered the most effective factor the removal of the bottom of the cover nozzle 80 from the level of the molten alloy in the container 10 to look at. In FIG. 3 illustrates this relationship

With the device according to the invention described so far, not only one wire with one Plating can be provided from a tin-lead alloy, but it can also be done without significant changes the structure of the facility a metal

strip can be provided with a coating of a desired metal or alloy. In In this case, the guide holes 78, 79, the opening 81 and the bore 84 are the cross-section of the Stripe designed accordingly.

1 sheet of drawings

Claims (3)

2 057 719 ^ driving is applied. So that the soldering together can be carried out reliably, the connecting conductors of the electrical components must have a good < 1. Have device for plating metal solderability. The connections consist of: wire or strip with molten metal, 5 wires or strips with a tin-lead alloy consisting of a molten metal tion plated. The thickness of the plating layer containing bath tank, supply devices must be known to be more than 10 μΐη to a < for the wire or the strip to and in the ensure good solderability. So far has been Bath tank in which plunger rollers are placed, using such wires and strips; a device for discharging the wire or electroplating process with a thick plat of the strip upwards out of the bath tank, provided with a coating that is, however, quite porous. is a thickness control device and is not in a eutectic state Metal coating and a cooling device takes place. These circumstances make the soldering good However, the metal layer immediately at the exit from the ability is impaired. With the electrodes! Bath, characterized in that 15 plating processes, it is difficult to choose from several the control device (15) at least one in the elements such as tin, lead and bismuth, a Schichi Melt bath (4) immersing guide member (51, to produce a homogeneous composition. 52), and a cooling chamber (53) with a supply. Likewise, it has so far been quite difficult to use the (86) for cooling liquid (85), which has a thick plate (83) at its bottom using conventional hot-dip processes to produce a bore (84) for the entry of the wire 20 trim layer with certainty. tes or the strip, and that according to US Pat. No. 3,284,892 a, a housing (54) for connecting guide z. B. annealed treated wire into one Unify member (51, 52) and cooling chamber (53) to form a bath container containing molten metal Body is provided, which is lowered by means of uud when pulling out the wire a flange (55) on one supporting it, in the 25 upwards of the container that is on the surface essentially horizontally arranged support plate of the resulting covering adhering to the wire (59) is freely movable. Tin stripped, after which the topping of a direct 2. Apparatus according to claim 1, characterized in that the water flow acting is cooled. Wei indicates that an additional monitoring will be carried out according to the German disclosure document member (87) is present that shows the temperature of 30 1521418 an immersed in molten metal coated wire (1) adjacent to the strip from the melt upward, through two Liquid (85) is detected and pulled through to the balancing press rolls, which are close to the mirror tion of the temperature are arranged on a predetermined melt and that on the strip Press together the th value with the liquid supply (86) coupled to the molten metal layer, pelt is. 35 after which the resulting strip is cooled. 3. Apparatus according to claim 1, characterized in that the control device (15) has a cover nozzle (80) that is uniformly thick between the licher and has a covering nozzle (80) that is required with this one for good solubility a thickness of the guide member (51,52) and the cooling chamber (53) more than 10 μΐη cannot be generated,
adjusted and fastened. 40 In French Offenlegungsschrift 2 009 335 discloses a method by which a wire can be provided with a thick coating. Here a wire immersed in a molten metal is moved upwards through a non- 45 metallic liquid, e.g. B. by an on the Surface of molten metal floating molten salt, drawn through it, around the coating to move from the melted state to the solid state. However, it is difficult to find the non-metallic The invention relates to a device for completely eliminating excess liquid which impairs the soldering of metal wire or strips with meltability of the covering,
liquid metal, consisting of a molten The invention is based on the object of a zene metal-containing bath container, to provide feed-in hot-dip device with which a wire directions for the wire or strip to and or a strip continuous with a thick and in the bath tank, in which swivel rollers 55 well solderable coating can be provided. These are, a device for discharging the wire task is done with the help of a control device or the strip upwards out of the bath container, the at least one thawed in the melt bath, a control device for controlling the thickness chendes guide member, a cooling chamber with a of the metal coating and a cooling device for the supply of cooling liquid, which has a the metal layer immediately at the exit from the 60 hole for the entry of the wire possesses, on-bath. has, with a housing for connecting guide Electrical circuits for electronic devices, connecting element and cooling chamber to form a unit such as computers, radios and televisions, are provided, which by means of a flange are made up of numerous electrical components, such as resistors, capacitors, transistors and substantially horizontally supporting it in 65 arranged support plate is freely movable.
Integrated circuits that participate in a circuit. An embodiment of the invention is characterized in this panel fastened and with each other through. Soldering is characterized by the fact that a monitoring connection is also provided, whereby there is generally a dip soldering link that measures the temperature of the